Up until a couple of weeks ago every other post on the main page of my forum had a really nice blue background so as to make the posts stand out and look more separate. It has suddenly stopped doing this and now all the posts have a white background. I have updated all my plugins but this has still not resolved the issue. Can you please help me get the blue backgrounds back. I have been to the css.style page and the coding in relation to the forum is below, should there be something else?